On 9/9/24 15:12, Steve Brown via Mailman-users wrote:
Looking at the headers of emails sent from st...@stevebrown.us to the list and boomeranged back to me, I see a line “X-MailFrom: bounce+66273f.99dcd9c-radg=lists.radg...@stevebrown.us”. I gather that it is designating the return path where a message would be sent if there was a delivery problem. From its position in the header, I suspect it is added as they pass through Mailgun, maybe related to DKIM.
Without seeing the full headers in sequence I can't say much, but some MTA in the delivery chain (likely your MX, mx1.tmdhosting.com) is setting the envelope sender of the message to bounce+66273f.99dcd9c-radg=lists.radg...@stevebrown.us so that it can receive DSNs at that address. Mailman's lmtp runner is adding the X-MailFrom: header as information.
Then Mailman's incoming runner ensures that all of the messages senders are known to mailman by creating, if necessary, address records for all of them. See <https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/runners/incoming.py?ref_type=heads#L73-75>. The senders are defined as addresses in the headers listed in the configuration setting `sender_headers`, default = from, from_ meaning envelope sender, reply-to and sender. See <https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/config/schema.cfg?ref_type=heads#L40-45>
I am hoping you might know why that bounce address is recognized by Mailman 3 as a real address for my emails, but not for others, even from my wife’s computer traversing the same path from our home to the Mailman 3 server. The Mailman installation does get and process the post, but also puts the “bounce+,,,” address in its list of nonmembers. Mailmanlists.net hasn’t figured out the behavior. I can provide full header information if that would help. My understanding of how headers work is very limited.
Are you saying that the `bounce+...` address ends up as a nonmember of the list you are sending to. I don't think that should happen. Mailman will add the `sender` address as a nonmember of the list if it is not a member, but the `sender` is the first non-empty value in `senders` which normally would be the From: address unless the installation has changed the `sender_headers` setting
-- Mark Sapiro <m...@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan _______________________________________________ Mailman-users mailing list -- mailman-users@mailman3.org To unsubscribe send an email to mailman-users-le...@mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/ Archived at: https://lists.mailman3.org/archives/list/mailman-users@mailman3.org/message/Z5CSFCMEUZT6C7ENC5VPHSGTD7IDBXWE/ This message sent to arch...@mail-archive.com
